<template>
  <div>
    <form class="card comment-form">
      <div class="card-block">
        <textarea class="form-control" placeholder="Write a comment..." rows="3" v-model="body"></textarea>
      </div>
      <div class="card-footer">
        <img :src="user.image" class="comment-author-img" />
        <button class="btn btn-sm btn-primary" @click.prevent="submitComment">
          Post Comment
        </button>
      </div>
    </form>
    
    <div class="card" v-for="comment in comments" :key="comment.id">
      <div class="card-block">
        <p class="card-text">{{comment.body}}</p>
      </div>
      <div class="card-footer">
        <nuxt-link :to="{
          name: 'profile',
          params: {
            username: comment.author.username
          }
        }" class="comment-author">
          <img :src="comment.author.image" class="comment-author-img" />
        </nuxt-link>
        &nbsp;
        <nuxt-link :to="{
          name: 'profile',
          params: {
            username: comment.author.username
          }
        }" class="comment-author">{{comment.author.username}}</nuxt-link>
        <span class="date-posted">{{comment.createdAt | date('MMM DD, YYYY')}}</span>
      </div>
    </div>

  </div>
</template>

<script>
import { mapState } from 'vuex'
import { getComments, addComment } from '@/api/article'
export default {
  name: 'ArticleComment',
  props: {
    article: {
      type: Object,
      required: true
    }
  },
  data () {
    return {
      // 文章列表
      comments: [],
      body: ''
    }
  },
  async mounted () {
    // 不要求SEO，请求数据放到mounted里面，只走客户端渲染
    const { data } = await getComments(this.article.slug)
    this.comments = data.comments
  },
  computed: {
    ...mapState(['user'])
  },
  methods: {
    async submitComment () {
      const { data } = await addComment(this.article.slug, this.body)
      this.comments.unshift(data.comment)
      this.body = ''
    }
  }
}
</script>